With increasing everyone’s car budget, the B-Class luxury brand gradually become the first choice of car. Interestingly, the BBA’s currently in the car and drive there are two optional four-wheel drive system, which allows a lot of people began to tangle. BBA 300,000 to buy the cars, in the end there is no need to choose four-wheel drive version of it? We have to analyze today analyze the problem.
With increasing everyone’s car budget, the B-Class luxury brand gradually become the first choice of car. Interestingly, the BBA’s currently in the car and drive there are two optional four-wheel drive system, which allows a lot of people began to tangle. BBA 300,000 to buy the cars, in the end there is no need to choose four-wheel drive version of it? We have to analyze today analyze the problem.
First of all, the Audi A4L in the country after the launch of version 6, from the previous Torsen AWD four-wheel drive becomes a timely system, which is the same with imported A4 Allroad quattro ultra timely four-wheel drive, the use of multi-plate clutch center differential type.
In fact, this four-wheel drive system and our common public in the car tapped Haldex AWD system structure is insignificant, multi-plate clutch arranged at the end longitudinally mounted gearbox in everyday driving, off center differential, pure precursor mode. Or rapid acceleration only when the computer system detects that the vehicle front wheels may slip occurs, pressing the central multi-plate clutch, torque to the rear axle, this time becomes a four-wheel drive mode.
According to the official data and information, quattro ultra 100 can be a percentage of full output torque to the rear axle in the most extreme condition, but this means that the first two limit state wheels lose grip completely or completely suspended state. In everyday driving, power rear axle can get no more than 50 percentage. In other words, A4L for a four-wheel drive form after opening up more like a pre-drive, rear-wheel drive bias rather than driving experience when Torsen differential structure previously used.
xDr
3-based new BMWive is also no longer a full-time four-wheel drive system, officially known as intelligent four-wheel drive, four-wheel drive system is actually based on timely multi-plate clutch center differential.
However, the difference is Audi, pure rear wheel drive system 3 in a two-drive mode, when the rear wheels slip, the structure will be pressing the multiple disc clutch, and power transmission to the front axle. Further, even in the four-wheel drive mode, the power distribution is the default xDrive 40:60 front-rear, rear-wheel drive is still biased characteristics. Only when the rear wheels slip completely, it will put more power is transmitted to the front axle.
Accordingly, even if the four-wheel drive version 3 series, there is still the main drive, in most cases the drive plate 3 two lines will not be significantly different.
Finally, Mercedes-Benz C-class, which is currently the only one among the three car models employ a full-time four-wheel drive structure. C-class also uses the four-wheel drive configuration of the multi-plate clutch, but its system employs four-wheel drive four-wheel drive mode, the default front-rear torque split 45:55.
Under extreme conditions, a maximum of 30 back and forth can be achieved: 70-70: 30 of the power distribution, that is, in any case, C in the front and rear axles are is a dynamic, 0 torque will not happen.
In addition, there is a set of C-class, called the 4ETS electronic traction control system, based on the entire system from the ABS, when a single wheel slip occurs, may be directed to the slipping wheel braking, transmitting power to the other side. Working principle and purpose of the system and our common electronic limited slip system is no essential difference.
by four-wheel drive structural point of view, BBA three-car structures are multi-plate clutch, partial precursor Audi, BMW rear-drive biased, but Mercedes-Benz is still the only full-time four-wheel drive structure, but added some accidents a.
four-wheel drive advantage is certainly not for me to say, on slippery surfaces theory can lead to better stability, this is why many users to buy in the northeastern regionFour-wheel drive car will as a very important reference conditions.
In addition to the slippery road, four-wheel drive is also able to harness more power, which is why more and more ultra-running, have to spend four small steel gun drive system to enhance the acceleration performance of the vehicle.
However, despite this, I still do not recommend you choose four-wheel drive system in the BBA 300,000 cars, which is why?
said before the four-wheel drive system capable of controlling more power, but look at A4L , 3 Series and C class, but also the most powerful is 330i, a 2.0T engine, maximum power 258, the maximum torque 400Nmiddot; m. The three-car selling low-power version, generally less than 200 horsepower, this time four-wheel drive system not only does not enhance performance of the vehicle, and have actually become cumbersome.
First, since the four-wheel drive system adds a propeller shaft, a differential, half-shafts and other components, it will increase the weight of the vehicle to a certain extent. Our BMW 325Li, for example, its M sport package two-drive version of the four-wheel drive version light compared to a full 105kg. Imagine if your car no reason to pull a 210 pounds of fat, certainly will weaken the power it!
is the most visible manifestation of acceleration performance, 325Li official hundred mph is 8.1 seconds, while the 325Li xDrive was 8.2 seconds. Four-wheel drive should theoretically accelerate faster fishes, but in the end but was offset by the added weight. The
Second, in addition heavier than, the energy loss due to four-wheel drive shaft and parts of the system itself, the same horsepower wheel drive vehicle, the actual wheel power will be weaker than the two-drive version number. We likewise 325Li, for example, two-drive version of the official top speed of 235km / h, while the four-wheel drive version is reduced to 228km / h.
Four-wheel drive system in addition to the added weight will affect the performance of the vehicle, it will also allow higher fuel consumption of the vehicle. Here we Benz C260, for example, it uses 1.5T + 48V light mixing system, rear-wheel drive version of the Ministry of fuel consumption 6L / 100km, the added fuel is C260 4MATIC system becomes 6.9L / 100km, the difference in the long run It is still very large.
because in addition to the additional weight would be more costly foreign oil, four-wheel drive system itself will be more costly oil. After all, under the same circumstances, an additional engine to drive the drive shaft, differential and other drive components, it is bound to burn more gasoline to make up for the loss of power.
In addition, due to the four-wheel drive system is more than a set of transmission components, in the latter part of the maintenance process will be more expensive, so if you buy a car budget itself is more nervous, and then forced the four that is to drive up your own sins!
If you want to buy a BBA’s SUV, then I will still be based on your usage scenario, and then consider whether to recommend that you buy four-wheel drive version. Because some people buy SUV is to cope with everyday bad road, this time by four-wheel drive system in terms of advantages can be reflected.
is the least bad way to go Allroad
while the car itself is very low ground clearance, virtually non-existent “off-road” use of this scene, the biggest advantage of four-wheel drive system does not play out, the more no need to buy a four-wheel drive. Do you want to go driving a 3 Series washboard road it? A4L or driving through cross-axis?
Of course, there are also some exceptions, it is the user’s northeastern region. As we all know, the Northeast to face several months of snow and ice every year, this time four-wheel drive system can indeed lead to better driving stability, many consumers will put the Northeast four-wheel drive condition as a reference when buying a car.
However, snow and ice for long period of time, the most preferred solution for the vehicle or change snow tires, snow chains and even loaded. When years ago I went to participate in the Changbai Mountain snow Audi test drive, theThere are four-wheel drive models, but for a snow tire grip of the car almost “spike” did not change the snow tire models, so the snow and ice, the priority is higher than the tire drive form.
bluntly said, the wheels to grip, even if the drive 8, can not help.
3 Series xDrive value of 15 000
This is the most direct and most practical problems. BBA models from the current allocation point of view, four-wheel drive system BMW 3 Series is the most expensive. 325Li M Sport Package guide price 346,900, while the 325Li xDrive M Sport Package pricing of 361,900, both post 1.5 million, exactly the same configuration and power, which is only a more timely four-wheel drive system. 4MATIC value
C-level nearly 27000
followed by the Mercedes-Benz C-Class, C 260 L sports version of the guide price of 346,800, while the C 260 L 4MATIC Sport’s guide price of 373,800, 27,000 yuan price difference. This difference in addition to a 27,000-wheel-drive system, the latter more than the 18-inch wheels and 64-color ambient lighting, but I still do not think it worthwhile, after all, the Mercedes-Benz C 260 1.5T power itself is relatively weak, the four flooding is really cumbersome.
45TFSI comes standard with four-wheel drive
Finally Audi A4L, many people say there is no four-wheel drive Audi is soulless, but Audi cars are on the road most of the prodromal I do not know faith pink Audi in the end there is no action. A4L current product distribution is unique, its low and medium power versions are not available four-wheel drive system, and 45TFSI high-power models are standard with four-wheel drive.
High-power four-wheel drive + = 40000
we still have the same configuration models, for example, is the guide price of 40TFSI 362 800 401 800 Sport and guidance of 45TFSI sport, both post 39000, other configurations are identical, which is more than 252 horsepower high-power engine and four-wheel drive system, spent close to 4 million to buy high-powered engine and four-wheel drive, I do not think it is value.
High-power low version no virtual cockpit
However, A4L There is also a version called 45TFSI personality Sport, guide price 362 800, equipped with the high price 40TFSI the same, but the lack of a lot of configuration, not even the reverse image, the size of the control panel is also only 7 inches. This version is obviously to those who do not buy non-four-wheel drive, but the budget is not particularly prepared for plenty of people.
in power will also provide four-wheel drive system
It is worth mentioning that, before the declaration of the Audi A4L models of mid-term facelift, 40TFSI power also joined the four-wheel drive system is available choice, but between the car is not listed, so this is not done the analysis.
In general, both the BMW, Mercedes or Audi, in order to obtain a four-wheel drive got to pay the money or configuration, or live like BMW, Mercedes and so direct more money, just like Audi or so to buy a configure very low four-wheel drive version.
By all counts, four-wheel drive is not necessary on 300,000 cars, it will not only create more fuel consumption, reduce power, improve the cost, but there is no real arena.
If there is very strong demand for four-wheel drive system, it might as well buy a better play to the advantages of four-wheel drive SUV models, you say, right?